PostEditor.swift
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PostEditor.swift
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	import SwiftUI

	struct PostEditor: View {
	@EnvironmentObject var postStore: PostStore

	@ObservedObject var post: Post

	@State private var isNewPost = false

	var body: some View {
	VStack {
	TextEditor(text: $post.title)
	.font(.title)
	.frame(height: 100)
	.onChange(of: post.title) { _ in
	if post.status == .published {
	post.status = .edited
	}
	}
	TextEditor(text: $post.body)
	.font(.body)
	.onChange(of: post.body) { _ in
	if post.status == .published {
	post.status = .edited
	}
	}
	}
	.padding()
	.toolbar {
	ToolbarItem(placement: .status) {
	PostStatusBadge(post: post)
	}
	ToolbarItem(placement: .primaryAction) {
	Button(action: {
	post.status = .published
	}, label: {
	Image(systemName: "paperplane")
	})
	}
	}
	.onAppear(perform: {
	checkIfNewPost()
	if self.isNewPost {
	addNewPostToStore()
	}
	})
	}

	private func checkIfNewPost() {
	self.isNewPost = !postStore.posts.contains(where: { $0.id == post.id })
	}

	private func addNewPostToStore() {
	withAnimation {
	postStore.add(post)
	self.isNewPost = false
	}
	}
	}

	struct PostEditor_NewDraftPreviews: PreviewProvider {
	static var previews: some View {
	PostEditor(post: Post())
	.environmentObject(testPostStore)
	}
	}

	struct PostEditor_ExistingPostPreviews: PreviewProvider {
	static var previews: some View {
	PostEditor(post: testPostData[0])
	.environmentObject(testPostStore)
	}
	}